JP2005315496A - Far-infrared grain drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase a temperature distribution in hot air chamber by far-infrared radiation or waste hot air in a far-infrared gain drier. <P>SOLUTION: This grain drier is so formed that a far-infrared radiation body formed longer starting at the front wall side of a machine frame to the rear side and in which a slit-like opening is formed at an upper and/or a lower part is installed in the hot air chamber, and connected to a burner in which the far-infrared radiation body is disposed on the front wall outer side. A burner air drum in which the burner is disposed at its center part is mounted on the front wall of the machine body, the burner air drum is allowed to communicate with the inlet part of the far-infrared radiation body, and a guide duct formed in a short tubular body with a cross section of the roughly same shape as that the inlet port formed in the front wall is mounted at the start side portion of the far-infrared radiation body in an externally installed state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grain dryer that promotes grain drying by mounting a far-infrared radiator in a hot air chamber.

In a grain dryer, it is comprised in the far-infrared grain dryer which radiates | emits a far-infrared ray toward the grain of a downstream passage. By the way, this far-infrared radiator is constituted by a long cylindrical body extending in the longitudinal direction of the machine body. A burner is connected to one end of the far-infrared radiator, and far-infrared radiation is emitted from the peripheral surface of the far-infrared radiator by heating with the burner flame. It is set as the structure (patent document 1). In addition, outside air can be introduced in the vicinity of the far-infrared radiator and introduced into the hot air chamber, and it is turned into hot air while mixing with far-infrared radiation heat or waste heat from the far-infrared radiator, and far-infrared radiation is emitted. It is comprised so that a grain may be dried with heat and this hot air.
JP 2002-48474 A

  However, in the configuration shown in Patent Document 1, outside air is introduced into the hot air chamber from around the burner portion, but the introduction configuration is not considered, and it is necessary to improve the temperature distribution of the hot air chamber due to far-infrared radiation or waste hot air. In particular, since the grain dryer has a long configuration before and after the machine body, it is necessary to perform uniform grain drying while suppressing temperature variations in the longitudinal direction.

  In order to solve the above problems, the present invention has taken the following technical means.

  The invention according to claim 1 is configured by stacking a storage tank, a drying chamber, and a cereal collection chamber in this order, and a hot air chamber and an exhaust air chamber are formed in the drying chamber with a grain flow passage interposed therebetween. Is provided with a far-infrared radiator which is formed long from the front side wall to the rear and has slit-like openings at the top and / or bottom, and which connects the far-infrared radiator to a burner disposed outside the front side wall. In the grain dryer, a burner wind tunnel having a burner disposed at the center is attached to the front side wall of the fuselage, the burner wind tunnel is connected to the inlet of the far-infrared radiator, and the inlet formed on the front side wall has a substantially identical shape. Let it be the structure of the far-infrared grain dryer which attaches the guide duct formed in the short cylinder of a cross-sectional shape to the start end side part of a far-infrared radiator in the exterior state.

  When configured as described above, combustion hot air from the burner mainly enters the far-infrared radiator cross section, whereas outside air introduced into the burner wind tunnel blows through the outer periphery of the far-infrared radiator along the inner periphery of the guide duct. .

  According to a second aspect of the present invention, in the first aspect, a shielding plate is provided between the inner peripheral part of the guide duct and the outer peripheral part of the far-infrared radiator to block the introduction of outside air. With this configuration, the temperature rise due to the opening of the front side portion of the far-infrared radiator and the suppression of outside air introduction by the guide duct promote the temperature rise near the burner, for example, at the upper part of the hot air chamber entrance, It is possible to equalize the temperature distribution of the entire chamber to be within an appropriate range.

  According to a third aspect of the invention, in the invention of the first or second aspect, the burner includes a rotary vaporization cylinder at the center of the combustion disc, and fuel ejected from a fuel nozzle provided inside the vaporization cylinder is provided. A vaporizing burner that is vaporized by a vaporizing cylinder that receives and heats a combustion flame and continues to burn while being ejected from a combustion disc is configured. The outside air guided to the guide duct acts on the combustion part of the vaporization burner as secondary air.

  According to a fourth aspect of the present invention, in the second or third aspect, the shielding plate is provided on the rear side of the guide duct. If comprised in this way, it will become a thing which cannot act on the outer peripheral part of a far-infrared radiator on the rear side of a guide duct.

  According to the first aspect of the present invention, outside air enters the hot air chamber and has a function of suppressing an increase in hot air temperature. When the burner combustion hot air enters the far-infrared radiator, it is guided rearward as it is, and the temperature near the upper part of the inlet side is lowered, so a slit-like opening is formed to discharge the combustion waste hot air. Therefore, it can be maintained in an appropriate temperature range by introducing outside air into this portion.

  According to the invention described in claim 2, the temperature rise due to the opening of the front side portion of the far-infrared radiator and the suppression of the introduction of the outside air by the guide duct, the temperature of the low temperature portion of the hot air chamber inlet near the burner The rise can be promoted and equalized so that the temperature distribution of the entire hot air chamber is within an appropriate range.

  According to the third aspect of the present invention, since the outside air guided to the guide duct acts as secondary air on the combustion part of the vaporization burner, it contributes to the secondary air supply of the vaporization burner during the rectification operation. The combustion of the burner is stabilized.

  According to the invention described in claim 4, when the burner combustion hot air enters the far-infrared radiator, it is guided rearward as it is, for example, the temperature near the upper part on the inlet side tends to be low. Although a slit-like opening is formed in the body, the introduction of outside air to this part further reduces the temperature, so that this outside air introduction can be blocked, so that it acts on the outer periphery of the far-infrared radiator on the rear side of the guide duct In combination with the rise in temperature due to the opening of the front side of the far-infrared radiator and the suppression of outside air introduction by the guide duct, for example, the temperature rise at the upper part of the hot air chamber entrance near the burner is promoted, and the entire hot air chamber Can be equalized so that the temperature distribution is within an appropriate range.

(Example)

  An embodiment of the present invention will be described below with reference to the drawings.

  First, the whole structure of the grain dryer provided with this invention is demonstrated. Reference numeral 1 denotes a machine frame of a grain dryer, in which a storage tank 2, a drying room 3, and a grain collection room 4 are stacked in this order. In the drying chamber 3, inclined grain flow passages 5, 5 are formed with the air-permeable mesh bodies 5 a, 5 a facing left and right, and a pair of left and right grain flow passages 5, 5 are formed in a V shape in front view. doing. The upper side of each grain flow passage 5, 5 further forms a diamond-shaped space inside the left and right grain flow passages 5, 5 so as to form a V shape, and this space is formed in the hot air chamber 6. . In addition, the lower half part of the space forming body having a rhombus cross section is constituted by a ventilation net body, and the V-shaped upper half part is constituted by a non-breathable plate material.

  A feeding valve 7 is provided below the left and right junctions at the lower ends of the grain flow passages 5 and 5. The feeding valve 7 is formed in a cylindrical body having a circular cross section. The feeding valve 7 receives grains from an inlet port formed in a part of the outer periphery with forward rotation and reverse rotation, and the lower cereal collection chamber 4 according to forward and reverse rotation. It is the structure which makes it fall.

  The hot air chamber 6 formed in the rhombus space inside the drying chamber 3 has a far-infrared radiator 10 that is formed in a polygonal cylindrical shape and has a length extending from the front side wall to the rear side wall of the drying chamber 3. And are detachably fixed to the front and rear surfaces of the machine wall. The far-infrared radiator 10 has a substantially hexagonal cross section that connects the inverted V-shape of the upper portion and the V-shape of the lower portion with a short vertical portion so as to correspond to the cross-sectional shape of the rhombus space portion. It is configured in a shape, and slit-like openings 11 and 12 are formed on the upper side and the lower side (see FIG. 3). In addition, the upper side opening 11 is formed over the predetermined range in the front side part of the body, and the lower side opening 12 is formed over the front and back.

  The left and right half parts are attached to the front and rear walls with bolts and nuts attached to the front wall with a locking tool 26 that straddles the front upper part of the left and right half parts, and the left and right half parts on the front side. The front and rear walls are detachably fixed to the front and rear walls by means of latches 27, 27 that are independently provided with the lower part and the upper and lower parts on the rear side.

  The far-infrared radiator 10 is configured to receive hot air from a burner 13 disposed in front of the dryer on the inlet side. That is, for example, a burner wind tunnel 14 having a vaporization type burner 13 disposed at the center is attached to the front wall of the machine body, and the burner wind tunnel 14 and the entrance of the far-infrared radiator 10 are communicated. That is, a burner wind tunnel 14 having a quadrangular cross section is mounted on the outside of the front side wall 3a, and one end of the far-infrared radiator 10 is mounted on the inside of the front side wall 3a, while a guide duct 28 is mounted. The guide duct 28 is formed in a short cylindrical body having a substantially quadrangular cross section at the introduction port 3b formed in the front side wall 3a, and is attached to the start end side portion of the far-infrared radiator 10 in an exterior state. . Therefore, the combustion air generated by the burner mainly enters the cross section of the far infrared radiator 10, whereas the outside air introduced into the burner wind tunnel 14 blows through the outer peripheral portion of the far infrared radiator 10 along the inner periphery of the guide duct 28. It is.

  The outside air introduced into the burner wind tunnel 14 functions as a secondary air supply when the burner 13 constitutes a vaporization type burner and enters the hot air chamber 6 as described above to suppress the rise of the hot air temperature. Is provided. The vaporization type burner 13 includes a rotary vaporization cylinder 35 in the center of the combustion disk 34, and the vaporized cylinder from which a fuel nozzle (not shown) provided inside the vaporization cylinder 35 receives and burns a combustion flame. The combustion is continued while being vaporized by 35 and ejected from the combustion disk 34. The cylindrical case 36 is provided with a blower fan (not shown) so that primary air can be supplied.

  By the way, when the burner combustion hot air enters the far-infrared radiator 10 and is guided rearward as it is, the temperature near the upper part on the inlet side tends to be low. In order to correct this, the slit-shaped opening 11 is formed as described above. Therefore, since the introduction of the outside air into this part further reduces the temperature, the shielding plates 29 and 29 are disposed on the front or rear side of the guide duct 28 so as to block the introduction of the outside air. It is provided so that it cannot act on the outer peripheral part (FIG. 4 (A) (B)).

  If comprised in this way, the temperature rise by the opening 11 of the front side part of the far-infrared radiator 10 and the suppression of outside air introduction by the guide duct 28 combine, and the temperature rise of the hot air chamber 6 upper part near the burner 13 is increased. It is possible to promote and equalize so that the temperature distribution of the entire hot air chamber 6 falls within an appropriate range.

  A suction fan 15 is provided on the back side of the machine body, and is formed outside the grain flow passages 5 and 5 from the hot air chamber 6 which is a rhombus space through the grain flow passages 5 and 5 by the wind of the suction fan 15. It is comprised so that it may ventilate toward the exhaust path 16,16.

  The cereal collection chamber 4 is provided with a lower conveying device 25 having a transfer spiral at the center thereof, and the grain fed from the feeding valve 7 is received by the lower conveying device 25 and transferred to, for example, the front side of the machine body. Elevator 17 is provided on the front side of the machine body, buckets 17a, 17a,... Are provided inside, so that the grains from lower conveyor 25 are picked up and cerealed at the start end of upper conveyor 31 provided on the upper ceiling. It is composed. A hanging shaft 32 is provided at the center of the ceiling on the terminal end side of the upper conveying device 31 provided with a transfer spiral, and a rotating diffusion plate 33 is attached to the hanging shaft 32.

  As shown in FIG. 6, a dryer controller (control unit) 40 is provided in front of the burner wind tunnel 14. A controller 40 operation panel 41 is provided in front of the burner wind tunnel 14. The operation panel 41 includes a tension switch 42, a ventilation switch 43, a drying switch 44, a discharge switch 45, and a stop switch 46. The switch group is used to switch to various operation modes and to stop the operation. Moreover, if the emergency switch 47 is provided and this emergency switch 47 is operated, the whole body operation part can be stopped substantially simultaneously.

  In addition to these switches 42 to 47, a tension amount setting switch 48 for setting the tension amount, a moisture setting switch 49 for setting the final finishing moisture value, and a drying setting switch 50 (drying speed in the case of drought drying) Is set to fast, normal, and slow, and in the case of other grain drying, for example, a drying speed set in advance in association with varieties such as wheat and barley is set. Furthermore, timer increase / decrease switches 51 and 52 are provided for drying the finished product according to the processing time without depending on the moisture value.

  The moisture detection means employs a single-grain moisture meter 53, measures the moisture value in units of a predetermined number of grains every predetermined time, calculates the moisture value by averaging the detection results of a predetermined number of times, and operates the operation panel 41. The display unit 54 alternately displays the detected hot air temperature and the like. In addition, the control unit 40 is configured to be able to determine the variation in moisture from the moisture value of one grain or to determine the number of immature grains, and these are displayed by three LEDs 55 and 56.

  In addition to inputting drying information and the like from the switch of the operation panel 41 to the control unit 40, detection information is input from various sensors to control the fuel supply amount of the vaporizing burner 13 and to provide a grain transfer system means. It is configured to control operation.

  Next, the operation of the above configuration will be described.

  The grain thrown into the tension hopper (not shown) is tensioned into the storage tank 2 via the elevator 17, the upper transport device 32, and the like that are driven by turning on the tension switch 42. When the squeezing of the grain is completed, the process proceeds to a drying operation. In the previous stage, the setting of the grain type and the desired dry finish moisture value are set by the moisture setting switch 49 and the drying setting switch 50.

  When the drying switch 44 is turned on after the setting operation is completed, the elevator 17, the upper / lower transport devices 25 and 31, the feeding valve 7 and the like are started to be driven, and the burner 13 is also driven so that the hot air flows into the drying chamber 3. It is supplied toward the entrance of the hot air chamber 6 which is a rhombus space.

  Here, the flame of the burner is hot-aired by the rotation of the suction fan 15, flows into the far-infrared radiator 10 while being mixed with the outside air introduced as appropriate, and heats the far-infrared radiator 10 to the upper and lower parts. It flows out of the far-infrared radiator 10 through the formed slit-shaped openings 11 and 12. At that time, far-infrared rays are emitted from the surface of the far-infrared radiator 10 by the heating of the far-infrared radiator 10, and both the thermal radiation and the hot air act on the grains flowing down through the flow-down passages 5 and 5, Moisture transfer inside the grain is promoted by radiant heat and hot air by infrared rays, and an efficient drying action is performed along with the water removing action by the hot air.

  The introduced outside air that enters the burner wind tunnel 14 and circulates around the outer periphery of the burner 13 enters the hot air chamber 6 from the front side wall 3 a after performing the function of supplying secondary air for burner combustion, but along the hot air duct 28. Circulates the outer periphery of the far-infrared radiator 10 and suppresses the temperature rise at the inlet of the hot air chamber 6. In addition, by providing the shielding plates 29 and 29, the outside air circulation is blocked by the shielding plates 29 and 29, and the temperature drop is suppressed. The shielding plates 29 and 29 may be provided between the hot air duct 28 and the tip portion far from the side near the burner 13. However, when the shielding plates 29 and 29 are provided near the burner 13, the introduced outside air as secondary air is supplied. By acting on the central side of the vaporizing burner 13 (FIG. 4 (a)), the heating of the vaporizing cylinder is accelerated in order to bring the flame to the vaporizing cylinder, and the shielding plates 29 and 29 are placed at the far end of the hot air duct 28. In the form to provide (the figure (b)), there exists an effect which can prevent abnormal overheating of a vaporization cylinder.

  Far-infrared radiation and hot air are dried over the grain flow passages 5 and 5, and the hot air passing through the grain flow passages 5 and 5 is exhausted through the exhaust chambers 16 and 16. The grain dried in the drying chamber 3 is returned again to the storage tank 2 via the lower conveying device 25, the elevator 17 and the upper transfer spiral 31 of the cereal collecting chamber 4, and undergoes a tempering action. Such a process is repeated and drying is completed when a predetermined moisture value is reached.

  The rear end side mounting of the far-infrared radiator 10 may be configured as shown in FIG. That is, the rear side portion of the far-infrared radiator 10 is closed by the lid 61, and the far-infrared radiator 10 is attached to the rear side wall 62 of the machine frame 1 with a metal fitting at a distance. And the hot air temperature sensor 63 and the exhaust air temperature sensor 64 are attached to the left and right above the rear end part of the far-infrared radiator 10. Further, as shown in FIG. 8, when the attachment pieces 61a and 61a are integrally formed on the left and right sides of the lid 61 by pressing, the lid 61 can be firmly attached to the far-infrared radiator 10 while reducing the number of parts. it can.

  As described above, since the predetermined interval is provided between the far-infrared radiator 10 and the rear side wall 62, the temperature of the rear side portion of the hot air chamber 6 does not become excessively high, and the hot air temperature sensor 63. And the detection temperature of the exhaust air temperature sensor 64 can be optimized.

  Moreover, you may comprise the far-infrared radiator 10 with a thermal radiation steel plate. Compared with the case where a far-infrared radiation paint is applied to a heat-resistant steel plate or the like, the process can be omitted, and the cost in assembly production can be reduced.

  Further, as shown in FIG. 9, a far-infrared radiator 10 is arranged at the center of the hot air chamber 6, and the distance between the left and right outer peripheral parts of the far-infrared radiator 10 and the left and right grain flow passages 5, 5 is made equal to the left and right. May be. With this configuration, the wind speed distribution of the intake air in the hot air chamber 6 is equalized and a stable temperature distribution can be obtained. Further, the left, upper right, middle, and lower surface portions 10a, 10a, 10b, 10b, 10c, 10c of the far-infrared radiator 10 and the upper passages 5b, 5b, middle of the left and right grain flow passages 5, 5 The passages 5c, 5c and the lower passages 5d, 5d can be made to face each other, and the entire hot air chamber 6 can be evenly warmed by radiant heat.

  Next, the seal configuration of the feeding valve 7 will be described with reference to FIGS.

  Below the lower end joining part of the left and right grain flow passages 5 and 5, a cylindrical feeding valve 7 is provided which feeds the grain while repeating forward and reverse rotation in a cylindrical cross section. , 5 is provided with a feeding opening 7a for feeding the grain, and left and right gaps 67, 67 between the left and right peripheral surfaces of the feeding valve 7 and the lower ends of the left and right grain flow passages 5, 5 are formed. Is configured.

  Left and right seal holding frames 68, 68 having a concave cross section are disposed below the lower ends of the left and right grain flow passages 5, 5 and on both left and right sides of the feeding valve 7. That is, the outer frame body 68a formed in a U-shaped section and the inner frame body 68b fitted to the outer frame body 68a are integrally configured. Seals 69, 69 slidably facing the feeding valve 7 are detachably fixed to the inner portions of the seal holding frames 68, 68, that is, at one corner of the inner frame 68b by a bolt and nut with a pressing plate 69a. Yes. Brackets 70a and 70b are attached to both front and rear ends of the seal holding frame bodies 68 and 68, and support holes 71'a and 71'b of the front and rear side walls 71a and 71b of the machine frame 1 and support holes of the brackets 70a and 70b. The front and rear support shafts 73a and 73b are inserted into 70'a and 70'b, and the seal holding frame bodies 68 and 68 are pivotally supported on the front and rear side walls 71a and 71b. An arm 74 is provided on the support shaft 73a on the front side with respect to the rotation axis (A), and the arm 74 is configured to be rotatable along the outside of the front side wall 71a.

  Thus, when the feeding valve 7 is rotated forward and backward by forward / reverse driving means (not shown), the left and right grain flow passages while the feeding opening 7 a of the feeding valve 7 rotates above the left and right seals 69, 69. In this configuration, the grains from 5 and 5 are received in the feeding valve 7 and the inside grains are fed downward while the feeding valve 7 rotates downward from the left and right seals 69 and 69.

  Further, bent pieces 76 and 76 are provided on the upper and lower sides of the front side wall 71a, and an adjusting bolt 78 is provided to vertically penetrate the bent pieces 76 and 76, and an adjusting body 79 is screwed onto the adjusting bolt 78 with a nut 80. ing. Reference numeral 77 denotes a locking nut which is screwed from below the bolt 78 to fix the bolt 78 between the bent pieces 76 and 76. Therefore, when the adjusting bolt 78 is rotated in the forward and reverse directions, the adjusting body 79 is configured to move up and down.

  By engaging the elongated hole 74a of the arm 74 with a bolt 80a that is screwed into the support hole 79a provided in the adjustment body 79, the support shaft 73a is rotated by interlocking the arm 74 with the vertical movement of the adjustment body 79. It is the structure which carries out rotation interlocking | working forward and backward about an axis (a). Thus, by rotating the adjustment bolt 78, the seal holding frame body 68 can be rotated and adjusted via the arm 74 of the support shaft 73a, and the degree of sliding contact between the seal 69 and the feeding valve 7 can be finely adjusted. (Gap adjusting means A).

  A support wall 71b that penetrates and supports the support shaft 73b is formed in the wall portion on the rear side surface, and the three of the support shaft 73b, the bracket 70b, and the seal holding frame body 68 are integrated, and the assembly order is as follows. The front support shaft 73a is removed, the seal holding frame body 68 is held by mounting the support shaft 73b, and then the support shaft 73a and the gap adjusting means are assembled to the front bracket 70a.

  Further, in the vicinity of the shaft support portion of the seal holding frame 68 on the front and rear side walls 71a and 71b, that is, on the left and right outer sides of the shaft support portions of the front and rear side walls 71a and 71b and corresponding to the air discharge chamber 16 of the drying chamber 3 An inspection window 81 is provided, and the inspection window 81 can be opened and closed by an inspection lid 82.

  With this configuration, when the lock bolt 75 and the bolt 80a are loosened, the support shaft 73a is removed from the bracket 70, and the support shaft 73a is removed from the seal holding frame body 68, the seal holding frame body 68 (and the seal) 69) is only supported by the other support shaft 73b, and the long seal holding frame 68 and the seal 69 can be taken out of the machine from the inspection window 81 on the front side wall. Further, the inspection and adjustment of the seal 69 and the seal holding frame body 68 can be easily performed from the inspection window 81, and the maintainability can be improved.

  Next, the soundproof structure of the storage tank 2 of the grain dryer will be described with reference to FIG.

  The tank side wall has a long side wall 84 and a short side wall 85 formed in a plurality of stages (in some cases, the height h (or h ′) is different). At each corner 85, a side wall fitting portion 86a formed into a bowl shape and stays 86b and 86b are formed on the side wall fitting portion 86a, and a soundproof plate support 86 to which hook bolts 86c and 86c are attached is formed. In the state where the long and short side walls 84 and 85 are assembled, the soundproof plate supports 86, 86. Next, the mounting holes 88, 88... Of the soundproof plates 87a, 87b formed along the long side and the short side are mounted on the hook bolts 86c, 86c. In addition, the soundproof board support body 86 fitted by the ceiling board (not shown) can be fixed. As a result, the scattered sound is reduced even if the grains scattered from the diffuser are received.

  In the conventional configuration, the upper side of the soundproof plate is bent, fitted to the side wall portion, and fixed by a ceiling plate (not shown), but in this form, the body vibration is transmitted from the side wall portion to vibrate and vibrate. However, if it is configured as shown in FIG. 14, the connection with the side wall is only the soundproof plate supports 86, 86.

  Next, the residual particle discharge structure of the upper transfer device 31 in the ceiling portion of the storage tank 2 will be described.

  In FIG. 15, the upper transport device 31 pivotally supports a transfer spiral 91 in the transport case 90, and an open / close bottom valve 92 is provided below the transport case 90. That is, a holding rail 93 having long holes 93a and 93a is fixed in the direction of the spiral shaft 91a on the rotating diffusion plate 33 side, and the open / close bottom valve 92 is slidably held on one end side of the holding rail 93. Sliding pins 92a, 92a on the open / close bottom valve 92 side are engaged with the long holes 93a, 93a, and the open / close bottom valve 92 is configured such that the transfer start end side can be rotated up and down around the center of the slide pin portion. Reference numeral 94 denotes a support arm that supports the open / close bottom valve 92. The support arm 94 is pivoted downward about a pivot portion on one side of the ceiling to slide the open / close bottom valve 92 along the long hole of the holding rail 93 and vertically. It is a structure that can be linked to opening and closing. An operating member 95 is provided in conjunction with the support arm 94 to rotate it up and down.

  By adopting a support configuration in which the open / close bottom valve 92 is slid like the holding rail 93 or the like, when rotating up and down, it can be rotated downward by shifting to a position outside the buffer with the rotation diffusion plate 33. Therefore, it can be rotated downward to a desired angle, and residual grains on the open / close bottom valve 92 can be eliminated.

  Note that the configuration shown in FIG. 16 may be used instead of FIG. In other words, the open / close bottom valve 96 has a folded structure, and one bottom valve 96a extends to the rotation diffusion plate 33 side and is supported by the holding rail 97, and the other bottom valve 96b is pivotally supported on the side wall portion on the start end side. It is the structure to do. An opening / closing operation mechanism 98 is formed outside the machine body. That is, a refraction link 98a that is connected to the pivot portion of the bottom valve 96b to rotate the support shaft portion, a hook member 98b that engages with a refraction portion of the refraction link 98a, and an operation that interlocks to engage and disengage the hook member 98b. It consists of an arm 98c and the like. When the operation arm 98c is pulled downward, the hook member 98b is disengaged and further pulled downward to rotate the refraction link 98a counterclockwise around the fulcrum, so that the open / close bottom valve 96b is rotated downward.

  As in FIG. 15, the same effect can be obtained because the open / close bottom valve 96 is slid.

  17 and 18 show an example of a grain dryer with far infrared irradiation by a far infrared lamp heater. Feeding valves 100 and 100 for feeding grains by a predetermined amount are provided on the left and right sides of the machine body, inclined guide plates 101 and 101 are provided below these feeding valves, and the grain flows down and guided to the transfer device 102 at the lower center of the machine body. It has a structure. A part of the inclined guide plate 101 is made of heat-resistant glass 103, and a plurality of far-infrared lamp heaters 104, 104,. 105, 105... Are infrared sensors that detect the far-infrared irradiation amount of the far-infrared lamp heater 104. Reference numerals 106 and 106 denote reflection diffusion plates.

  In the grain dryer configured as described above, the grain stuck in the upper storage tank is fed from the feeding valves 100 and 100 through the grain flow passage, and the heat resistant glass 103 of the inclined guide plate 101. It is dried by far infrared irradiation by the far infrared lamp heater 104 when flowing down the part. The grain that has flowed down the inclined guide plate 101 is transferred to one side of the front and rear by the lower transfer device 102. The transferred grain is returned to the storage tank and conditioned by an elevator and an upper transfer device (not shown). The drying is performed to a predetermined moisture value while repeating such a process. The drying may be performed only by the far-infrared lamp heater 104, or may be used in combination with circulation-type drying using hot air from a burner.

  By the way, a means for detecting the load current of the lift motor that drives the lift when performing the operation for stretching into the storage tank is provided, and a means for monitoring whether or not this load current value has been reduced to a predetermined value is provided. When continuing for a predetermined time, it is determined that the suspending operation is interrupted, and the far infrared lamp heater 104 is turned on. The circulation motor that drives the feeding valve 100 is also turned on to perform drying by irradiation with far infrared rays (FIG. 19). This is done until the end of the insertion. If comprised in this way, a drying operation can be performed during the standby time during the tension operation, and even if the moisture content is high, the grain quality does not deteriorate. In addition, since the drying operation is performed during the tension operation, preliminary drying is performed, and the total drying time can be shortened.

  When the drying switch is turned on separately after the above-mentioned tensioning operation, the grains stuck to the storage tank are dried by the far-infrared lamp heater 104 while being circulated and transferred. At this time, the far infrared irradiation amount is detected by the infrared sensor 105, this irradiation amount is displayed during the drying, and when this irradiation amount decreases, an abnormal display is performed. The operator determines at that time whether or not the operation is continued even in a situation where the irradiation amount is reduced, and can perform an appropriate drying operation when the drying operation can be continued even if the irradiation amount is small ( FIG. 20).

  In the above example, the configuration is such that the irradiation amount of the far-infrared lamp heater 104 is detected by the infrared sensor 105, but it may be detected by a temperature sensor disposed at the same position.

  The infrared sensor 105 and the temperature sensor can detect the far-infrared irradiation amount, and such an irradiation amount detection sensor is provided corresponding to each of the far-infrared lamp heaters 104 arranged in a plurality of planes, and starts drying. Whether the lamp heater 104 is correct or not can be determined by checking the lighting of the lamp heater 104 before the grain circulation. Therefore, a delay in drying due to a defective lamp heater can be prevented by determining whether the lamp heater 104 is right before drying (FIG. 21).

  Further, the number of lighting and / or the lighting cycle of the far-infrared lamp heater 104 can be changed depending on the amount of extension to the storage tank. When the amount of extension is small, the number of lighting is reduced and the lighting cycle is lengthened. When the amount of extension is large, the number of lighting is increased and the lighting cycle is shortened. If comprised in this way, suitable drying according to the amount of tension can be performed (FIG. 22). In addition, it is also possible to change the number of lighting and the lighting cycle according to the drying speed calculated based on the detected moisture value in addition to the amount of tension.

  FIG. 23 shows an improvement of the grain dryer using the far-infrared lamp heater 104. A part of the inclined guide plate 101 is constituted by the heat-resistant glass 103, and the far-infrared lamp heaters 104, 104 are formed on the back surface of the heat-resistant glass 103. Are arranged in a planar shape, and the reflectors 107 and 107 are installed on the upper side of the inclined guide plate 101 so that far-infrared rays can be irradiated from the upper part of the flowing grain, and far-infrared rays can be used efficiently. .

FIG. The front view which cut the whole part. The perspective view of an example of a far-infrared radiator. (A) (B) Side view of essential parts. The front view of the principal part. The front view of an operation panel. The side view of a far-infrared radiator. The side view of a cover part, a rear view, and a top view. The front schematic diagram of the principal part. The expanded front sectional view of a delivery valve part. The disassembled perspective view of a feeding valve. The disassembled perspective view of the gap adjusting mechanism. The plane sectional view of a seal holding frame. The perspective view which shows a sound-proof board support structure, and an enlarged perspective view. The side view of an upper transfer apparatus. The side view of the upper transfer apparatus which shows another example. The front sectional view of a grain dryer provided with a far-infrared lamp heater. The side view of the grain dryer provided with the far-infrared lamp heater. flowchart. flowchart. flowchart. flowchart. The front sectional drawing of the grain dryer provided with the far-infrared lamp heater of another example.

Explanation of symbols

1 Grain dryer frame 2 Storage tank 3 Drying room 4 Grain collection room 5 Grain flow passage 6 Hot air room 7 Feeding valve 7
7a Feeding opening 10 Far-infrared radiator 11 Opening 12 Opening 13 Burner 14 Burner wind tunnel 16 Exhaust chamber 28 Guide duct 29 Shielding plate

Claims (4)

A storage tank, a drying room, and a grain collection room are stacked in this order, and a hot air chamber and an exhaust air chamber are formed in the drying chamber with a grain flow passage in between. In a grain dryer in which a far-infrared radiator having a slit-like opening formed in the upper part and / or the lower part is provided and the far-infrared radiator is connected to a burner disposed outside the front side wall, The burner wind tunnel placed on the airframe is attached to the front side wall of the fuselage, and the burner wind tunnel is connected to the inlet of the far-infrared radiator. The far-infrared grain dryer which attaches | guides | derives the guide duct to the start end side part of a far-infrared radiator in the exterior state. The far-infrared grain dryer according to claim 1, wherein a shielding plate is provided between an inner peripheral part of the guide duct and an outer peripheral part of the far-infrared radiator to block introduction of outside air. The burner has a rotary vaporization cylinder in the center of the combustion disk, and the fuel ejected from the fuel nozzle provided inside the vaporization cylinder is vaporized by the vaporization cylinder that receives and heats the combustion flame and continues to burn while being ejected from the combustion disk The far-infrared grain dryer according to claim 1 or 2, comprising a vaporization burner. The far-infrared grain dryer according to claim 2 or 3, wherein a shielding plate is provided on the rear side of the guide duct.

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